JPS63116213A - Automatic setting method for working condition - Google Patents

Abstract

PURPOSE:To prevent an edge part from generating burn through to highly accurately work the edge part and to shorten the working time by correcting a working condition set up at the time of starting the work at the edge part in the working shape. CONSTITUTION:An edge program is loaded from an auxiliary storage device 20 and started. Then the file name of NC data for setting up the material of a work, its plate thickness and working conditions is inputted to a CPU15 by an input means 16. A CPU15 reads out a corresponding working condition data base, inputs NC data, and when the input data are edge working data, executes the division of the NC data based upon a working condition changing length l obtained from a working condition data base table, selects the magnification of the corresponding working condition on the basis of an angle angle theta, changes and adds the working condition of the edge part, and outputs the obtained condition to an image output device 17. These NC data are temporarily stored in a main storage device 14 and processed up to the final block and the changed data are written in the device 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for automatically setting processing conditions for an edge portion in, for example, a laser processing machine, and in particular to improving processing performance.

[Conventional technology]

Figure 6 is a configuration diagram of a conventional laser processing machine system.
In the figure, (1) shows the NC according to the machining shape of the workpiece.
Automatic program creation W for creating and modifying data
i, (2) is the laser oscillator (3) and the processing machine body (4) based on the NC data created by the automatic program creation device (1).
) (hereinafter referred to as the NC device).
The operation panel (5) of the NC device (2) has a laser output (W) setting section (6) and a frequency (H) setting section (6) as shown in FIG.
2) setting section 7 and duty (%) setting section (8)
Each setting section is provided with a setting knob (9) and a setting section display (11). (12) is NCVia (2)
This is a teaching box for teaching.

In order to set the processing conditions in the laser processing machine system configured as described above, the NC device (2
) to set machining conditions such as laser output, frequency, duty, etc. that match the material and thickness of the workpiece by changing the setting knob (9) on the operation panel (5) (manual/
It's called a mode. ), or an automatic programming device (
1) Add machining conditions that match the material and plate thickness of the workpiece to the NC data using the machining condition setting program that runs in step 1).
According to this NC data, at the start of machining, the NC device (2) determines machining conditions by automatically setting laser output, frequency, etc. (referred to as auto mode).

For example, the material of the workpiece is a cold rolled steel plate (SPCC), and the plate is ffromm, and the machining shape has a straight line (P a P b) and a straight line (P b P c
), the ninth
As shown in the figure, the linear movement command (GO
Coordinates (X50) of points I) and (P b), linear movement command (Got) to point (Pc), and coordinates (X-) of point (Pc)
50, Y-22) etc. is displayed in the NC data (11),
Processing conditions that match the material and plate thickness of the workpiece, for example, laser output (S) of 100OW and duty (T) of 40%.
, frequency (B) is 300Hz, processing speed is 2000mm
/min, and the laser oscillator (3) and the processing machine body (4) are controlled based on the set processing conditions to process the workpiece.

[Problem that the invention seeks to solve]

In the conventional machining condition setting method described above, the machining conditions are set at the start of machining the workpiece, and the machining condition settings are constant during machining, so if the machining condition settings at the start of machining are large, When the melt reaches a sharp edge, there is a risk that the tip of the edge will receive too much heat and the melt will drop.

Additionally, if the processing conditions such as the laser output at the start of processing are reduced in order to set the heat input at the tip of the edge to an appropriate value, the processing speed must be slowed down, which causes the problem that the total processing time becomes longer. there were.

The present invention has been made in order to solve these problems, and it is an object of the present invention to propose a method for automatically setting machining conditions that enables edge portion machining with high precision and high efficiency.

[Means for solving problems]

The method for automatically setting machining conditions according to the present invention sets the optimal machining conditions by inputting the material and thickness of the workpiece, and also searches for NC data in which the machining shape has a sharp edge. This is a method of correcting the NC data to the optimum machining conditions for that edge.

[Effect]

In this invention, by correcting the machining conditions set at the start of machining when the machining shape becomes an edge portion, it is possible to set the optimal machining conditions that match the machining shape.

〔Example〕

FIG. 1 is a block diagram showing the configuration of an automatic program creation device for realizing the automatic processing condition setting method according to an embodiment of the present invention. In the figure, (12) is the main body of the automatic program device; (12) has an edge program (13), a main memory (14) for storing input processing information, and a central processing unit (hereinafter referred to as CPU') (15). (16) is, for example, a keyboard, and the processing information is automatically programmed into the main body (
12) is an input device for input, (17) is an image output device,
(18) is a graphic output device, (19) is a paper tape league puncher that inputs and outputs the created NC data, (20)
) is auxiliary storage.

The auxiliary storage device (20) stores in advance a database of machining conditions corresponding to the material of the workpiece, the plate thickness, and the edge angle of the machined shape.

FIG. 2 shows an example of the database stored in the auxiliary storage device (20), and the machining condition database (21) includes a comment indicating the database, the machining material, and the plate thickness such as 5pcc and 10.0, Processing conditions according to the material and plate thickness, for example, processing speed 2000mm/mi
n, laser output 1000 W, frequency 300 Hz, duty 40%, and the value of the machining condition change length l) of the edge part of the machining shape, for example 20 mm, a comment on the machining conditions of the sharp edge part, and the angle of the edge part. The processing speed magnification, laser output magnification, frequency magnification, duty magnification, etc. that should be changed according to (θ) are described.

FIG. 3 is a flowchart showing a processing procedure when machining conditions are automatically set by the automatic program creation device, and the operation of this embodiment will be described below with reference to the flowchart of FIG. 3.

First, by starting setting machining conditions (step 30), the edge program (13) is loaded from the auxiliary storage device (20) and started (step 31). Next, input means (16
) to input the file name of the NC data that sets the material, plate thickness, and processing conditions of the workpiece into the CPU (15).
Step 32). Thereafter, the CPU (15) reads a machining condition database suitable for the material and plate thickness of the workpiece from the machining condition database corresponding to each material and plate thickness stored in the auxiliary storage device (20) (step 33). For example, the workpiece is a cold rolled i-plate (S P CC
), the machining conditions database table (2
1) is read out.

Next, the CPU (15) stores the NC data in the auxiliary storage device (
20) Read from (step 34), read NC
It is checked whether the data is data for sharp edge machining (step 35), and if it is edge machining data, the NC data is divided according to the machining condition change length i) from the machining condition database table (21) read out. , select the magnification of the corresponding machining condition based on the edge angle (θ), change or add the machining condition at the edge part, and display it on the image output bag R (17) (step 36). The NC data is temporarily stored in the main memory (14) (step 37), and the process is repeated until the final block of the NC file is reached (step 38). After that, write the changed NC data to the auxiliary storage device (20) (
Step 39), and the setting of processing conditions is completed (Step 40).

The setting of processing conditions for the sharp edge portion will be explained using a specific example shown in FIG. 4. Figure 4 shows that after linear machining is performed from point Pa (0,0) to point Pb (50°0) on the X-Y coordinates, from point Pb (50,0) to point Pc (0, -
22) shows the case where straight line machining is performed up to
This is the case where the angle (7) between Pb) and the straight line (PbPc) forms a sharp edge angle (θ) of 20 degrees. It is assumed that the workpiece corresponds to the processing condition database table (21) shown in FIG.

In this case, as shown in NC data (22) in FIG.
Data (22) first includes the processing conditions according to the material and plate thickness of the workpiece, that is, the laser output S is 1000 W, the duty (T) is 40%, the frequency (B) is 300 W, and the processing speed (F) is It is described as 2000 mm/min. After determining that the data is edge processing data from the NC data in this state (step 35), the NC data is divided by the processing condition change length of the edge portion (1)=22 mm. In other words, as shown in Fig. 4, the line between straight & 1l (PaPb) is divided into straight line (PaP, ) and straight line (P, Pb), and between straight line (PbPc) is divided into straight line (PbPZ) and straight line (Pg P
c) and written into the NC data (22) as shown in the second to fifth blocks of FIG. Next, the edge angle (θ
) Select a magnification of each machining condition corresponding to 20 degrees, for example, a machining speed magnification of 0.3, and set the laser output (S) to 500W and the duty (T) as shown in the third block of NC data (22). 40%, frequency (B) 260Hz
, the machining speed (F) is changed to 600 mm/min and written in the auxiliary storage device (20), and the setting of machining conditions matching the milling angle (θ) is completed.

In addition, in the above embodiment, the machining conditions for the edge portion are shown as change magnifications such as the machining speed magnification as an example of machining condition data, but even if the actual machining speed for each edge angle (θ) is displayed, the above The same effect as in the embodiment can be achieved.

Furthermore, although the above embodiments have been described in the case of laser processing, the present invention can be similarly applied to processings having sharp edges in the processing shape, such as gas cutting processing.

〔Effect of the invention〕

As explained above, this invention can automatically set the optimal processing conditions according to the edge angle when processing the edges of a machined shape, thereby preventing melt drop at the edges. This has the effect that the edge portion can be processed with high accuracy.

Furthermore, it is not necessary to perform processing by lowering the processing speed and laser output from the beginning in order to prevent melting of the edges from falling off, as in the conventional method, and therefore the processing time can be greatly shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an automatic program creation device according to an embodiment of the present invention, FIG. 2 is a diagram showing a database stored in an auxiliary storage device in the above embodiment, and FIG. Flowchart showing the operation of the example, FIG. 4 is an explanatory diagram showing a specific example of the above embodiment, FIG. 5 is a diagram showing NC data of the specific example shown in FIG. 4, and FIG. 6 is a diagram of the laser processing machine system. 7 is an external view of the operation panel of the NC device shown in FIG. 6, FIG. 8 is an explanatory diagram of a conventional example, and FIG. 9 is a diagram showing NC data of the conventional example. (1) Automatic program creation device, (
2)・・・・・・NC device, (3)・・・・・・
... Laser oscillator, (4) ...... Processing machine main body, (12) ...... Automatic programming device main body, (13) ......・・ETSUJI program,
(14) Main memory, (I5)
......Central processing unit, (16)...
...Input device, (17) ...... Image output device, (20) ...... Auxiliary storage device, (21
)・・・・・・・・・Processing condition database, (11)
, (22).......NC data. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] Processing conditions according to the material, plate thickness, and edge angle of the machined shape of the workpiece are stored in a database in advance in an auxiliary storage device, and the NC is created according to the machined shape.
Processing that adds and corrects NC data by selecting optimal processing conditions from a database of processing conditions recorded in an auxiliary storage device by inputting data, workpiece material, and plate thickness into an automatic program creation device. How to automatically set conditions.